这个问题的标题不言自明。我正在使用 JFrame 制作扫雷游戏的克隆,并且刚刚完成了玩家选择游戏大小的起始屏幕。单击按钮时,应该清除框架以准备进入游戏屏幕。当我单击一个按钮时,该按钮仍处于“按下”状态,JFrame 冻结,我必须将其关闭。我究竟做错了什么?
代码:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Minesweeper extends JFrame implements ActionListener{
JLabel starttitle;
ButtonObject[] gamefield;
JFrame frame;
JPanel startscreen;
JPanel gamescreen;
int gamesize;
JButton ten;
JButton tfive;
JButton fifty;
GridLayout layout;
public Minesweeper()
{
frame = new JFrame("Minesweeper");
frame.setSize(500,500);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setResizable(false);;
startscreen = new JPanel();
startScreen();
}
public void startScreen()
{
ten = new JButton("10 x 10");
tfive = new JButton("25 x 25");
fifty = new JButton("50 x 50");
starttitle = new JLabel("Welcome to minesweeper. Click a game size to begin.");
frame.add(startscreen);
startscreen.add(starttitle);
startscreen.add(ten);
startscreen.add(tfive);
startscreen.add(fifty);
ten.addActionListener(this);
tfive.addActionListener(this);
fifty.addActionListener(this);
}
public void gameScreen()
{
frame.getContentPane().removeAll();//freezes JFrame
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==ten)
{
gamesize = 10;
gameScreen();
}
else if(e.getSource()==tfive)
{
gamesize = 25;
gameScreen();
}
else if(e.getSource()==fifty)
{
gamesize = 50;
gameScreen();
}
else
{
System.out.println("Fatal error");
}
}
public static void main(String[] args)
{
new Minesweeper();
}
}